OpenAI is making changes to its popular chatbot following a lawsuit alleging that a teenager who died by suicide this spring relied on ChatGPT as a coach.In a blog post Tuesday, the artificial intelligence company said that it will update ChatGPT to better recognise and respond to different ways that people may express mental distress – such as by explaining the dangers of sleep deprivation and suggesting that users rest if they mention they feel invincible after being up for two nights.The...